Bay of Fundy, Cruising, Saint John River -

Saint John Reversing Falls Slack Times 2017


Reversing Falls Black and White Slack Tide

2018 Transit times are here

Here is an easy reference for determining when the approximate time is for slack tide at Reversing Falls on the Saint John River. Slack time provides an approximately 20 minute window for traversing the passage.

These times are based on:

  • Low slack, add 3 hours and 50 minutes to low tide
  • High slack, add 2 hours and 25 minutes to high tide

The source tide data is from Fisheries and Oceans: 

Transit times are current local time with DST applied.

You can download an offline copy of this spreadsheet here.


Actual times will depend on the current river water levels but this will give you a close guide. You should review the cruising guides for more information on traversing the falls safely and to confirm calculations.


On the other side of the falls



All data and information provided on this page is for informational purposes only. Afloat Marine Supplies makes no representations as to accuracy, completeness, currentness, suitability, or validity of any information on this site and will not be liable for any errors, omissions, or delays in this information or any losses, injuries, or damages arising from its display or use.

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